Qimonda AG is a new memory company that was split from Infineon Technologies on May 1, 2006. It is the world's second largest DRAM company, leader in 300mm wafer industry and personal computers. And one of the largest suppliers of server DRAM products. Qimonda is now a wholly-owned subsidiary of Infineon, headquartered in Munich, Germany, with net sales of 4.89 billion in fiscal year 2006, and profit before tax and interest of 259 million.

Its predecessor was the semiconductor division of the Siemens Group, which was independent in 1999 and listed in 2000.

Qimonda :Its Chinese name is Yiheng Technology, which was renamed Infineon Technologies after 2002. Design, develop, manufacture, and sell a wide range of semiconductors and complete system solutions for specific areas. Products are widely used in the wired and wireless communications, automotive and industrial electronics, computer security, and chip card markets. The product suite consists of memory and logic products and includes digital, mixed-signal and analog ICs, discrete semiconductor devices, and system solutions. The memory department was independently formed by Qimonda on July 1, 2006 and has been independently listed.

Qimonda is product portfolio consists of memory, DRAM .